Waste-valve fob hydrants



lUNITED STATES PATENT OFFICE.

ROBERT LAVSON, OF ST. LOUIS, MISSOURI.

WASTE-VALVE FOR HYDRANTS.

Specification of Letters Patent No. 16,061, dated November 11, 1856.

To all whom t may concern Be it known that yI, ROBERT LAWSON, of the city of St. Lo-uis, in the State of Missouri, have invented a new and Improved Hydrant-Valve; and I do hereby declare that the following is a full and eXact description thereof, reference being had to the accompanying dra-wings and the let ters of reference marked thereon.

Figure 2 shows the exterior of the valve, (it being globular in orm,) and Fig. l shows a cross section through A.

The nature of my invention consists in providing the hydrant with a receiving and waste valve, in combination with an air chamber, the valves to be so arranged that the one shall necessarily waste when the other ceases to receive, the object of which is to prevent the receiving pipe from bursting by the percussion of the water when suddenly brought to rest by closing the valve or the distributing pipes from being burst by the frost. To do this I make of iron or other metal the chamber C, (shown on the drawing Figs. l and 9,) having an internal chamber A, which communicates with the outside of the chamber C by means 'of the nozzle F, to which Jthe distributing pipe is to be attached. In the internal chamber A I insert the sleeve M, which is made to screw in the top of the chamber, as shown on the drawing, Figs. 1 and 2, and form a joint in the bottom, as shown at I, Fig. 1. This joint is to be made of leather, or its` substitute, and to be impervious to water. The valve stem D I make to work loosely in the sleeve M, so that the water can run freely around it, and so as to form the valve B, and on the end I place another valve E. The water entering the receiving pipe at .I passes up around the valve stem in the sleeve M and out through the aperture N in the distributing nozzle F. Now if I desire to stop the ingress of water to the valve and waste it out of the distributing pipes I raise the valve stem D, which closes the valve E and opens the valve B, which stops the ingress of the water to the valve and allows it to fall back out of the distributing pipes in the sleeve M and pass up around the stem I) and out through the valve B, where it is wasted. The distributing pipes being thus left empty, the valve E is kept tight by the pressure of the water against its bottom side. The receiving pipe is relieved of the strain occasioned by the percussion of the water when the valve E is suddenly closed by the water entering through the passage L and cushioning against the atmosphere in the chamber C. The lugs H H, Fig. 2, are to bolt the valve to the hydrant by.

I claim as my inventionl. The interior arrangement and 'combr nation of water valve, and air chamber, as shown on the drawing, accompanying this instrument, and as described herein.

2. I do not claim the application of an air chamber to the receiving pipe as new, but I claim its peculiar combination, with the water-valve, as herein set forth, as new and as my invention.

ROBT'. LAIVSON.

Vitnesses:

AMos BROADNAX, CLARENCE DELAFIELD. 

